Water and sand heater.



c. 'A.LOND,ELIUS,'JR.

WATER AND SAND HEATER.

APPLICATION FILED MN. 4. 1917.

Patented Aug. 7, 1917.

UNITED STATES PATENT OFFICE.

CHRISTIAN A. LONDELIUS, JR., OF CHICAGO, ILLINOIS, ASSIGNOR- TO C. A.LONDELI US & SONS CO., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

Application filed January 4, 1917.

To all whom it may concern:

Be it known that I, CHRISTIAN A. LoN- DELIUS, J11, a citizen of theUnited States, and a resident of Chicago, county of Cook, and State ofIllinois, have invented certain new and useful Improvements in Water andSand Heaters, of which the following is declared to be a full, clear,and exact description.

This invention relates to combined hot water and sand heaters, and itsprimary object is to provide a simple, substantial and practical heater,which may be used in the open, and particularly in cold weather, forheating water and sand. It is well known that during the cold weather,water must be heated for mixing concrete or other sand and cementmixtures, and that sand in cold weather becomes frozen into lumps, sothat the sand cannot be used until it has been thawed out. Ordinarily along iron pipe is used for heating the sand, a fire being, builttherein, and sand being thrown upon the pipe. This is not entirelysatisfactory because the water must be heated by some other means. Inthe present invention, the same device is employed to heat and dry thesand as is employed to heat the water. The invention consists,therefore, in the several novel features hereinafter fully set forth andclaimed.

The invention is clearly illustrated in the drawing, accompanying thisspecification, in which Figure 1, is a central longitudinal sectionthrough a combined heater, embodying a simple form of the presentinvention; Fig. 2, is a vertical cross section taken on the line 2-2 ofFig. 1; Fig. 3, is a plan of the heating coils, partly broken away; andFig. 4, is a detail section taken on the line 1-t of Fig. 3.

Referring to said drawing, 5, designates an arched sheet metal casing orshell; its lower edges are bent outward, as at 6, to provide flanges orfeet, which are adapted to rest upon the ground. For the purpose ofstrengthening and reinforcing said sheet metal casing or shell, Iprovide a number of reinforcing members, here shown in the form of angleiron bars 7, which are shaped to conform to the contour or cross sectionof the casing 5. There should be a sufiicient number of reinforcingmembers 7, to assist the casing in supporting the load of sand which isdumped upon it. Said angle iron Specification of Letters Patent.

Patented Aug. *7, 1917.

Serial No. 140,600.

reinforcing members are perfectly riveted to the casing, and extendtransversely along the inside thereof from one lower edge to the other.One end of the structure may be permanently closed by an end piece 8,riveted to the end angle iron 7, and a smoke stack or flue 9, may beprovided at said closed end of the structure. The other end may betemporarily closed by a cover or door, 10, hinged at its lower end tothe struc ture, and arranged to be held in place by a hook or the like11. An open "space is left between the lower edge of the cover 10, andthe ground for the admission of air to the combustion chamber of thedevice.

Secured to said angle irons 7, are transversely extending angle ironbars 12, that support the grate bars, and said angle iron bars 12, arearranged in an inclined plane (clearly seen in Fig. 2), the purpose ofwhich will be set forth later on. Resting upon said angle iron bars 12,is a flat coil of pipe 13, the coils of which preferably run lengthwiseof the structure, and terminate in ends, one of which is provided with ashutoff valve 14, and the other end of which is arranged for connectionwith a flexible tube, 15; a flexible tube 16, is removably secured tothe shutoff valve 14. Preferably, the shutoff valve 14, has a drainvent, which (in accordance with the common and well known practice invalves or shutoff cocks) remains closed while the valve is open, andopens whenever the valve is closed, thereby permitting water remainingin the pipe, to drain out. The coil of pipe 13, acts as the grate barsfor the heater, and is held in place by transversely extending angleiron bars 17, the vertical flanges of which are notched to receive thecoils of pipe, as clearly indicated in Fig. 2. Bolts 19, connect thehorizontal flanges of the angle iron bars, and are provided with nutsupon their ends, whereby the parts may be clamped together. In this way,a light, substantial and practical heater is provided, which may employwood as a fuel for heating the water contained in the pipes, and forheating the sand dumped upon the casing.

In use, fuel is placed upon the coil of pipe, the fuel ignited, and theshutoff valve 1 1, opened to permit water to run through the coil ofpipe. The lower end of the front of the heater being open, air entersthe device at this end, passes underneath the grate bars, up through thecombustion chamber and then out through the smoke stack or fiue 9. Thecasing or shell 5, becomes heated, and water passing through the coil ofpipes becomes heated sufficiently for use in preparing cement, concrete,mortar, and the like. At the same time sand may be dumped upon the hotshell or casing, and the lumps thawed out, whereby it is quickly putinto condition for use.

When it is desired to discontinue the use of the heater, the main Watersupply is shut ofi", and the shutoff valve 14-, is opened, whereby thewater contained in the coil of pipe is permitted to drain out throughthe a vent in the valve lt, at the lower end of the coil, thus avoidingany danger of the Water freezing in the pipes, when exposed to the coldatmosphere and not in use.

I claim as new, and desire to secure by Letters Patent:

1. A combined water and sand heater, comprising an arched sand heatingshell, open at one end and closed at the other, there being a smokestack at the said closed end, a plurality of transverse, reinforcingmembers secured upon the inner face of said shell, a plurality oftransversely extending bars, and a coil of pipe supported by said bars,said coil of pipe serving as the grate bars for fuel contained in saidshell, and having connections for flexible inlet and discharge pipes.

2. A combined water and sand heater, comprising a semi-circular sandheating shell, open at the bottom and closed at one end, there being asmoke stack at said closed end, a plurality of transverse angle ironreinforcing bars secured upon the inner side of said shell, a pluralityof transverse bars, secured to said angle iron reinforcing bars, saidtransverse bars being inclined from one side of the structure to theother, a coil of pipe resting upon said tran verse bars and forming thegrate bars of the heater, notched angle iron bars overlying the pipes ofsaid coil, and bolts connecting said notched bars and coil supportingbars, said coil of pipe being arranged for connection with flexibleinlet and discharge pipes.

CHRISTIAN A. LONDELIUS, JR.

Copies or this patent may be obtained for live cents each, by addressingthe dommissioner of Patents, Washington, D. G.

